Development workflows for Codex that keep technical rigor and edge-case handling from becoming product overengineering.

HERO = Hashing · Edge cases · Rubrics · Overbuild — the four shapes coding agents over-defend in. A paste-in contract that stops them. Works with Claude Code, Codex, Antigravity, Cursor, Copilot, Windsurf, Gemini CLI.

Headless product design for AI coding agents, backed by a transactional product graph | Design how it works, verify what you ship.